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Hoffmann, R. and Wachs, W. O. and Berger, R. G. and Kalbitzer, Hans Robert and Waidelich, D. and Bayer, E. and Wagner-Redeker, W. and Zeppezauer, M. (1995) Chemical phosphorylation of the peptides GGXA (X = S; T; Y): an evaluation of different chemical approaches. International journal of peptide and protein research 45 (1), pp. 26-34.
Hoffmann, R. and Reichert, I. and Wachs, W. O. and Zeppezauer, M. and Kalbitzer, Hans Robert (1994) ¹H and ³¹P NMR spectroscopy of phosphorylated model peptides. International journal of peptide and protein research 44 (3), pp. 193-198.